Cyber Resilience

NIST 800-53 r5 · Controls catalogue · Family SI

SI-9Information Input Restrictions

Information Input Restrictions

Last updated: 22 August 2026 07:11 UTC

Implementations targeting this control (0)

ATT&CK techniques this control mitigates (0)

Weaknesses this control addresses (8)AI-assisted

CWEs ranked by how often they appear in real CVEs. The rationale describes how this control reduces exploitability of each weakness class.

CWE Name CVEs Why this control addresses it
CWE-862Missing Authorization10,200+Prevents missing authorization checks for input operations by restricting the capability itself.
CWE-284Improper Access Control6,900+Directly enforces access control by limiting input capability exclusively to authorized personnel.
CWE-863Incorrect Authorization3,900+Reduces incorrect authorization decisions by gating all input at the personnel/process level.
CWE-306Missing Authentication for Critical Function3,300+Ensures critical input functions cannot be reached without prior authorization.
CWE-285Improper Authorization1,500+Implements authorization checks on who may supply information to the system.
CWE-425Direct Request ('Forced Browsing')200+Blocks unauthorized direct requests or forced browsing by denying input access to non-authorized actors.
CWE-807Reliance on Untrusted Inputs in a Security Decision94Reduces reliance on untrusted inputs by ensuring only authorized sources may supply data.
CWE-642External Control of Critical State Data18Limits external actors' ability to control critical state through input channels.

Top CVEs where this control is the strongest mitigation

CVE Risk CVSS EPSS Match
No CVEs annotated to this control yet — the per-CVE backfill is in progress.

Other controls in family SI

SI-1 SI-10 SI-11 SI-12 SI-13 SI-14 SI-15 SI-16 SI-17 SI-18 SI-19 SI-2 SI-20 SI-21 SI-22 SI-23 SI-3 SI-4 SI-5 SI-6 SI-7 SI-8